Buying guide · 2026-05-03

How to read a product certification without getting fooled

Certifications fall into three buckets: third-party-issued and credible, self-issued and decorative, and ambiguous-issued and confusing. The trick is knowing which is which without spending 20 minutes per product.

The three buckets, named

Certifications on a product page roughly split into:

1. Third-party-issued and credible — issued by an independent body that audits, certifies, and revokes. Examples: GOTS, OEKO-TEX 100, EU Ecolabel, FSC, MSC, Fairtrade, B Corp, Energy Star.

2. Self-issued by the brand or marketplace — looks like a certification but is a marketing label. Examples: Amazon Climate Pledge Friendly, brand-specific 'sustainable choice' programmes.

3. Ambiguous — issued by an industry body that may or may not be independent of the brands it certifies. Examples: many of the 'eco-friendly' textile labels that turn out to be industry-sponsored.

The 30-second check

Three questions in order. If you can answer all three quickly, the certification is probably credible:

1. Who issues it? Look for a non-profit, regulatory body, or standards organisation. Not the brand, not the marketplace.

2. Can I look up this specific product/certificate on the issuer's site? GOTS, Fairtrade, FSC, B Corp all have public registries. If you can search the cert number and confirm the product, that's the strongest signal.

3. Has it been independently audited? Most credible certifications publish their audit methodology. The presence of a methodology PDF on the issuer's site is the signal.

The certifications worth memorising

Across categories, these are the ones that recur:

Textile + apparel: GOTS (organic, full chain), OEKO-TEX 100 (substance safety), GRS (recycled content), Bluesign (chemical/water), Fair Wear (factory conditions).

Food + drink: EU Organic (regulated), Fairtrade (producer prices), Rainforest Alliance (sourcing + livelihood), MSC (sustainable seafood).

Wood + paper: FSC (forest stewardship), PEFC (alternative but weaker than FSC).

Electronics: EPEAT (lifecycle), Energy Star (per-hour efficiency), iFixit repairability score (independent index, not strictly a certification).

Construction + materials: Cradle to Cradle Certified (lifecycle), LEED (building), BREEAM (building).

Whole-company: B Corp (governance + practices), Climate Neutral (declared offsets, independently audited).

The greenwashing patterns to spot

Common red flags:

- The brand has its own certification logo. Almost always marketing. - The certification name is the brand name. 'XYZ Sustainable' = marketing. - The certification doesn't say what it certifies. 'Eco-certified' on the bottle but no issuer mentioned = marketing. - The certification is on the marketing page but not the product detail. If the bottle of cleaner says 'eco' on the front of the website but nothing on the actual product page, that's the strongest tell. - The certification is for a percentage that's never specified. '70% recycled' without GRS or similar = unverified claim. - The certification was issued ten years ago and never updated. Most credible certifications require annual or biennial re-audit.

The one-paragraph version

Look for a third-party issuer, a public registry, and a published audit methodology. If you can confirm those three in 30 seconds, trust the certification. If you can't, treat it as marketing until you can.

It's not a perfect filter — credible certifications occasionally get gamed, and rare brand-issued labels are genuinely held to high standards. But applied as a default, it filters out the majority of greenwashing without requiring you to memorise 50 labels.

On Shop IMPT

Our sustainability methodology page lists the certifications we accept for editorial inclusion, and what we require beyond certification (supply-chain transparency, repairability, end-of-life design). The threshold is: ≥3 of 6 criteria, certifier and certificate ID required.

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